WO2022185746A1 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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Publication number
WO2022185746A1
WO2022185746A1 PCT/JP2022/001484 JP2022001484W WO2022185746A1 WO 2022185746 A1 WO2022185746 A1 WO 2022185746A1 JP 2022001484 W JP2022001484 W JP 2022001484W WO 2022185746 A1 WO2022185746 A1 WO 2022185746A1
Authority
WO
WIPO (PCT)
Prior art keywords
fixed terminal
contact
fixed
movable contact
electromagnetic relay
Prior art date
Application number
PCT/JP2022/001484
Other languages
French (fr)
Japanese (ja)
Inventor
直樹 川口
剛 西田
亮太 箕輪
Original Assignee
オムロン株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by オムロン株式会社 filed Critical オムロン株式会社
Priority to CN202280015556.0A priority Critical patent/CN116888702A/en
Priority to US18/278,619 priority patent/US20240128034A1/en
Priority to DE112022000457.6T priority patent/DE112022000457T5/en
Priority to KR1020237027731A priority patent/KR20230130106A/en
Publication of WO2022185746A1 publication Critical patent/WO2022185746A1/en

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
    • H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
    • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
    • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

  • the present invention relates to electromagnetic relays.
  • electromagnetic relays In electromagnetic relays, an arc occurs at the contacts when the current is interrupted. Therefore, some electromagnetic relays are equipped with magnets for extinguishing arcs. The Lorentz force acting on the arc by the magnet elongates the arc, thereby rapidly extinguishing the arc.
  • a pair of magnets are arranged outside the first fixed contact and the second fixed contact.
  • a pair of magnets are arranged apart from each other in the longitudinal direction of the movable plate.
  • a pair of magnets generate a magnetic field for extending the arc in a direction crossing the longitudinal direction of the movable plate.
  • An object of the present invention is to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals in an electromagnetic relay.
  • An electromagnetic relay includes a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact, a second movable contact, and a movable contact piece. , a drive, an outer magnet, and an inner magnet.
  • the first fixed contact is connected to the first fixed terminal.
  • the second fixed terminal is spaced apart in the first direction from the first fixed terminal.
  • the second fixed contact is connected to the second fixed terminal.
  • the first movable contact is arranged to face the first fixed contact in the second direction.
  • the second direction is a direction crossing the first direction.
  • the second movable contact is arranged to face the second fixed contact in the second direction.
  • the movable contact piece is connected to the first movable contact and the second movable contact.
  • the driving device moves the movable contact piece in the second direction.
  • the outer magnet is arranged outside the first fixed terminal and the second fixed terminal.
  • the outer magnet generates a magnetic field for extending arcs generated between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact.
  • At least a portion of the inner magnet is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction.
  • the inner magnet generates a magnetic field for extending the arc in a third direction.
  • the third direction is a direction crossing the first direction and the second direction.
  • the arc is extended by the magnetic field generated by the outer magnet.
  • the arc is thereby quickly extinguished.
  • the short-circuited arc is extended in the third direction by the magnetic field generated by the inner magnet.
  • the short-circuited arc between the first fixed terminal and the second fixed terminal can be quickly extinguished.
  • deterioration in the breaking performance of the electromagnetic relay is suppressed.
  • the electromagnetic relay may further include a projecting portion.
  • the protrusion may be arranged in a third direction with respect to the outer magnet.
  • the protrusion may extend towards the inner magnet. In this case, the arc extended in the third direction is expanded to the left and right of the protrusion. The arc is thereby quickly extinguished.
  • the protrusion may have a tapered shape toward the inner magnet. In this case, the arc is more effectively spread left and right by the protrusion. The arc is thereby quickly extinguished.
  • the protrusion may be made of insulating material. In this case, the arc is quickly extinguished.
  • the first fixed terminal may include a first corner directed to the outside of the first fixed terminal.
  • the direction in which the arc extends from the first fixed terminal can be controlled by the first corner. Thereby, the arc can be easily extended toward the outside of the first fixed terminal.
  • the second fixed terminal may include a second corner facing outward of the second fixed terminal.
  • the direction in which the arc extends from the second fixed terminal can be controlled by the second corner. Thereby, the arc can be easily extended toward the outside of the second fixed terminal.
  • the inner magnet may include a first surface and a second surface.
  • the second surface may be closer to the first stationary contact and the second stationary contact than the first surface.
  • the inner magnet may include an intermediate portion, a first portion, and a second portion.
  • the intermediate portion may be positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction.
  • the first portion may overlap the first fixed terminal when viewed from the second direction. Second part. It may overlap with the second fixed terminal when viewed from the second direction. In this case, the range over which the arc is extended by the magnetic field from the inner magnet is increased.
  • FIG. 4 is a cross-sectional view of an electromagnetic relay in an open state;
  • FIG. 4 is a cross-sectional view of the electromagnetic relay in a closed state; It is an enlarged view of a contact device.
  • FIG. 2 is a sectional view along IV-IV in FIG. 1; It is a figure which shows the electromagnetic relay which concerns on a 1st modification. It is a figure which shows the electromagnetic relay which concerns on a 2nd modification. It is a figure which shows the electromagnetic relay which concerns on a 3rd modification. It is a figure which shows the electromagnetic relay which concerns on a 4th modification. It is a figure which shows the electromagnetic relay which concerns on a 5th modification. It is a figure which shows the electromagnetic relay which concerns on a 6th modification.
  • FIG. 21 is a diagram showing an electromagnetic relay according to a ninth modification
  • FIG. 20 is a diagram showing an electromagnetic relay according to a tenth modification
  • FIG. 21 is a diagram showing an electromagnetic relay according to an eleventh modified example
  • It is a figure showing the 1st fixed terminal concerning the 11th modification.
  • It is a figure showing other examples of the 1st fixed terminal concerning the 11th modification.
  • FIG. 21 is a diagram showing an electromagnetic relay according to a twelfth modification; It is a figure showing the 1st fixed terminal concerning the 12th modification.
  • FIG. 1 is a cross-sectional view of an electromagnetic relay 1 according to an embodiment.
  • the electromagnetic relay 1 includes a case 2, a contact device 3, and a drive device 4.
  • the case 2 is made of an insulating material such as resin or ceramic.
  • a contact device 3 is accommodated in the case 2 .
  • the contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , and the second movable contact 13 .
  • the direction in which the movable contact piece 8 extends is defined as the first direction (X1, X2).
  • the first directions (X1, X2) include a first longitudinal direction (X1) and a second longitudinal direction (X2).
  • the second longitudinal direction (X2) is opposite to the first longitudinal direction (X1).
  • a direction from the second fixed contact 11 to the first fixed contact 10 is defined as a first longitudinal direction (X1).
  • a direction from the first fixed contact 10 to the second fixed contact 11 is defined as a second longitudinal direction (X2).
  • the direction in which the first fixed contact 10 and the first movable contact 12 face each other is defined as the second direction (Z1, Z2).
  • the second directions (Z1, Z2) include upward (Z1) and downward (Z2).
  • the direction from the first movable contact 12 to the first fixed contact 10 is defined as upward (Z1).
  • a direction from the first fixed contact 10 to the first movable contact 12 is defined as downward (Z2).
  • the first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are electrically conductive. It is made of a material that is flexible.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of metal materials known as terminal materials such as phosphor bronze, beryllium copper, brass, or tough pitch copper.
  • the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of materials different from these materials.
  • the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of metal known as a contact material such as copper-based metal or silver-based metal.
  • the first fixed terminal 6 and the second fixed terminal 7 extend in the second direction (Z1, Z2).
  • the first fixed terminal 6 and the second fixed terminal 7 have, for example, a cylindrical shape.
  • the first fixed terminal 6 and the second fixed terminal 7 are spaced apart from each other in the first direction (X1, X2).
  • a first fixed contact 10 is connected to the first fixed terminal 6 .
  • a second fixed contact 11 is connected to the second fixed terminal 7 .
  • the first fixed contact 10 and the second fixed contact 11 are arranged inside the case 2 .
  • the movable contact piece 8 , the first movable contact 12 and the second movable contact 13 are arranged inside the case 2 .
  • the first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8 .
  • the first movable contact 12 faces the first fixed contact 10 .
  • the first movable contact 12 can be brought into contact with and separated from the first fixed contact 10 .
  • the second movable contact 13 faces the second fixed contact 11 .
  • the second movable contact 13 can be brought into contact with and separated from the second fixed contact 11 .
  • the first movable contact 12 is spaced apart from the second movable contact 13 in the first direction (X1, X2).
  • the movable contact piece 8 is movable in the second direction (Z1, Z2).
  • the movable contact piece 8 is movable between an open position shown in FIG. 1 and a closed position shown in FIG.
  • the movable contact piece 8 is in the open position and the movable contacts 12,13 are separated from the fixed contacts 10,11.
  • the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11 .
  • the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction.
  • a direction in which the movable contacts 12 and 13 separate from the fixed contacts 10 and 11 is defined as a separation direction.
  • the movable mechanism 9 supports the movable contact piece 8.
  • the movable mechanism 9 includes a drive shaft 15 and contact springs 16 .
  • a drive shaft 15 is connected to the movable contact piece 8 .
  • the drive shaft 15 extends in the second direction (Z1, Z2) and passes through the movable contact piece 8 in the second direction (Z1, Z2).
  • the drive shaft 15 is provided movably in the second directions (Z1, Z2).
  • the contact spring 16 biases the movable contact piece 8 in the contact direction.
  • the drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26.
  • the driving device 4 uses electromagnetic force to move the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 .
  • Coil 21 is wound around spool 22 .
  • the movable core 23 and the fixed core 24 are arranged inside the spool 22 .
  • the movable iron core 23 is connected to the drive shaft 15 .
  • the movable core 23 is movable in the second directions (Z1, Z2).
  • the fixed core 24 is arranged to face the movable core 23 .
  • the return spring 26 biases the movable iron core 23 in the opening direction.
  • the electromagnetic relay 1 when the coil 21 is energized, the magnetic force generated by the magnetic field generated by the coil 21 attracts the movable core 23 to the fixed core 24 . Thereby, the movable iron core 23 and the drive shaft 15 move in the contact direction against the biasing force of the return spring 26 . Thereby, the movable contact piece 8 moves to the closed position shown in FIG. After the movable contacts 12 and 13 contact the fixed contacts 10 and 11, the contact spring 16 is compressed by further movement of the drive shaft 15 in the contact direction.
  • the electromagnetic relay 1 has outer magnets 41 and 42 .
  • the outer magnets 41 and 42 generate a magnetic field for extending arcs generated between the first fixed contact 10 and the first movable contact 12 and between the second fixed contact 11 and the second movable contact 13.
  • the outer magnets 41, 42 are arranged outside the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
  • the outer magnets 41 and 42 include a first outer magnet 41 and a second outer magnet 42.
  • the first outer magnet 41 and the second outer magnet 42 are permanent magnets.
  • the first outer magnet 41 and the second outer magnet 42 are arranged around the case 2 .
  • the first outer magnet 41 and the second outer magnet 42 may be arranged inside the case 2 .
  • the first outer magnet 41 is arranged in the first longitudinal direction (X1) with respect to the first fixed terminal 6 .
  • the second outer magnet 42 is arranged in the second longitudinal direction (X2) with respect to the second fixed terminal 7 .
  • FIG. 3 is an enlarged view of the contact device 3.
  • FIG. FIG. 4 is a sectional view along IV-IV in FIG.
  • a direction perpendicular to the first directions (X1, X2) and the second directions (Z1, Z2) is defined as a third direction (Y1, Y2).
  • one of the third directions (Y1, Y2) is defined as a first lateral direction (Y1)
  • the direction opposite to the first lateral direction (Y1) is defined as a second lateral direction (Y2). .
  • the first outer magnet 41 and the second outer magnet 42 generate a magnetic field inside the case 2 .
  • An arrow A1 indicated by a two-dot chain line in FIGS. 3 and 4 indicates the magnetic field generated by the first outer magnet 41 and the second outer magnet 42.
  • the first outer magnet 41 and the second outer magnet 42 are arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 faces the south pole of the second outer magnet 42 .
  • a first Lorentz force F1 acts on the arc generated at 12 and 12 .
  • the first Lorentz force F1 acts in the first lateral direction (Y1).
  • the arc is thereby elongated in the direction of the first Lorentz force F1.
  • the second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 .
  • the second Lorentz force F2 acts in the second lateral direction (Y2).
  • the arc is thereby elongated in the direction of the second Lorentz force F2.
  • a first Lorentz force F1' acts on the arc generated at and.
  • the first Lorentz force F1' acts in the second lateral direction (Y2).
  • the arc is thereby elongated in the direction of the first Lorentz force F1'.
  • a second Lorentz force F ⁇ b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 .
  • the second Lorentz force F2' acts in the first lateral direction (Y1).
  • the arc is thereby elongated in the direction of the second Lorentz force F2'.
  • the electromagnetic relay 1 has an inner magnet 43 .
  • the inner magnet 43 generates a magnetic field for extending the short-circuited arc AC1 between the first fixed terminal 6 and the second fixed terminal 7 in the third direction (Y1, Y2).
  • Arrow A2 in FIG. 3 indicates the magnetic field generated by the inner magnet 43 .
  • the inner magnet 43 is arranged, for example, so that the N pole faces downward (Z2).
  • the inner magnet 43 is arranged between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
  • the inner magnet 43 is arranged inside the case 2 . That is, the inner magnet 43 is arranged in the shielding space inside the case 2 for extinguishing the arc.
  • the inner magnet 43 is arranged above (Z1) the first fixed contact 10 and the second fixed contact 11 .
  • the arc is extended by the magnetic fields generated by the outer magnets 41 and 42 .
  • the arc is thereby quickly extinguished.
  • the magnetic field generated by the inner magnet 43 extends the arc in the third direction (Y1, Y2).
  • the structure of the driving device 4 is not limited to that of the above embodiment, and may be modified.
  • the drive device 4 is arranged below the contact device 3 (Z2).
  • the drive device 4 may be arranged in the first direction (X1, X2) or in the third direction (Y1, Y2) with respect to the contact device 3 .
  • the contact direction is upward (Z1) and the release direction is downward (Z2).
  • the contact direction may be downward (Z2) and the release direction upward (Z1).
  • the structure of the contact device 3 is not limited to that of the above embodiment, and may be modified.
  • the number of fixed contacts and movable contacts is not limited to two, and may be more than two.
  • the first fixed contact 10 may be separate from or integrated with the first fixed terminal 6 .
  • the second fixed contact 11 may be separate from or integral with the second fixed terminal 7 .
  • the first movable contact 12 may be separate from or integral with the movable contact piece 8 .
  • the second movable contact 13 may be separate from or integral with the movable contact piece 8 .
  • the arrangement of the magnets is not limited to that of the above embodiment, and may be changed.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged such that the same poles face each other.
  • the S pole of the first outer magnet 41 and the S pole of the second outer magnet 42 may be arranged to face each other.
  • FIG. 5 is a diagram showing an electromagnetic relay 1 according to a first modified example.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged facing each other in the third direction (Y1, Y2).
  • arrows A3 and A4 indicate magnetic fields generated by the first outer magnet 41 and the second outer magnet .
  • the first outer magnet 41 and the second outer magnet 42 may be arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 may face the south pole of the second outer magnet 42 .
  • a first Lorentz force F1 acts on the arc generated between the first fixed contact 10 and the first movable contact 12. do.
  • the first Lorentz force F1 acts in the second longitudinal direction (X2).
  • the arc is thereby elongated in the direction of the first Lorentz force F1.
  • a second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 .
  • the second Lorentz force F2 acts in the first longitudinal direction (X1).
  • the arc is thereby elongated in the direction of the second Lorentz force F2.
  • a third Lorentz force F3 acts on the short-circuited arc AC1.
  • the third Lorentz force F3 acts in the second lateral direction (Y2).
  • the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
  • the arc generated between the first fixed contact 10 and the first movable contact 12 causes the first Lorentz force F1' acts.
  • the first Lorentz force F1' acts in the first longitudinal direction (X1).
  • the arc is thereby elongated in the direction of the first Lorentz force F1'.
  • a second Lorentz force F ⁇ b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 .
  • the second Lorentz force F2' acts in the second longitudinal direction (X2).
  • the arc is thereby elongated in the direction of the second Lorentz force F2'.
  • a third Lorentz force F3' acts on the short-circuited arc AC1.
  • the third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
  • the first outer magnet 41 and the second outer magnet 42 may be arranged with the same poles facing each other.
  • the arrangement of the first outer magnets 41 and the second outer magnets 42 of the above embodiment and the first outer magnets 41 and the second outer magnets 42 of the first embodiment may be combined. That is, the outer magnets 41 and 42 are arranged in the first longitudinal direction (X1), the second longitudinal direction (X2), the first lateral direction (Y1), and the second lateral direction (Y2) of the case 2, respectively. good too.
  • FIG. 6 is a diagram showing an electromagnetic relay 1 according to a second modified example.
  • the electromagnetic relay 1 may include a first projecting portion 44 and a second projecting portion 45 .
  • the first projecting portion 44 and the second projecting portion 45 may be arranged in the third direction (Y1, Y2) with respect to the outer magnets 41, 42 when viewed from the second direction (Z1, Z2).
  • the first protrusion 44 and the second protrusion 45 may extend between the first fixed contact 10 and the second fixed contact 11 .
  • the first projecting portion 44 may be arranged in the first lateral direction (Y1) with respect to the outer magnets 41 and 42 .
  • the second protrusion 45 may be arranged on the side opposite to the first protrusion 44 in the third direction (Y1, Y2). That is, the second protrusion 45 may be arranged in the second lateral direction (Y2) with respect to the outer magnets 41,42.
  • the first and second protrusions 44 and 45 may extend toward the inner magnet 43 .
  • the first and second protrusions 44 and 45 may have a tapered shape toward the inner magnet 43 .
  • the first protrusion 44 may have a tapered shape in the second horizontal direction (Y2).
  • the second protrusion 45 may have a tapered shape in the first lateral direction (Y1).
  • the first and second protrusions 44 and 45 may be made of an insulating material such as resin or ceramic.
  • the arc AC1 extended in the third direction (Y1, Y2) by the inner magnet 43 is spread in the first direction (X1, X2) by the first and second projections 44, 45.
  • FIG. Arc AC1 is thereby quickly extinguished.
  • FIG. 7 is a diagram showing an electromagnetic relay 1 according to a third modified example.
  • the electromagnetic relay 1 may include a plurality of first protrusions 44A, 44B and a plurality of second protrusions 45A, 45B.
  • FIG. 8 is a diagram showing an electromagnetic relay 1 according to a fourth modification. As shown in FIG. 8, the projections 44, 45 may have a linear shape.
  • FIG. 9 is a diagram showing an electromagnetic relay 1 according to a fifth modification.
  • the fixed terminals 6 and 7 may have a square prism shape.
  • the first fixed terminal 6 may include first corners 6A, 6B facing outward of the first fixed terminal 6 when viewed from the second direction (Z1, Z2).
  • the second fixed terminal 7 may include second corners 7A and 7B extending outward of the second fixed terminal 7 when viewed in the second direction (Z1, Z2).
  • the first corner 6A may face the second longitudinal direction (X2) and the first lateral direction (Y1).
  • the first corner 6B may face the second longitudinal direction (X2) and the second lateral direction (Y2).
  • the second corner portion 7A may face the first longitudinal direction (X1) and the first lateral direction (Y1).
  • the second corner 7B may face the first longitudinal direction (X1) and the second lateral direction (Y2).
  • the direction in which the arc is extended can be controlled in the direction in which the corners 6A, 6B, 7A, and 7B are directed.
  • FIG. 10 is a diagram showing an electromagnetic relay 1 according to a sixth modification.
  • the first corners 6A, 6B and the second corners 7A, 7B may face the third direction (Y1, Y2).
  • the first corner 6A and the second corner 7A may face the first horizontal direction (Y1).
  • the first corner 6B and the second corner 7B may face the second horizontal direction (Y2).
  • the fixed terminals 6 and 7 are not limited to having a square prism shape, and may have other shapes.
  • FIG. 11 is a diagram showing an electromagnetic relay 1 according to a seventh modification. As shown in FIG. 11, the fixed terminals 6 and 7 may have a triangular prism shape. Alternatively, the fixed terminals 6 and 7 may have a shape other than a triangular prism.
  • FIG. 12 is a diagram showing an electromagnetic relay 1 according to an eighth modification. As shown in FIG. 12, the inner magnet 43 may be arranged outside the case 2 .
  • FIG. 13 is a diagram showing an electromagnetic relay 1 according to a ninth modification.
  • the inner magnet 43 may be covered with an insulating material 46 such as resin or ceramic.
  • the entire inner magnet 43 may be covered with insulating material 46 .
  • FIG. 14 is a diagram showing an electromagnetic relay 1 according to a tenth modification.
  • Inner magnet 43 includes a first surface 431 and a second surface 432 .
  • the first surface 431 is the top surface of the inner magnet 43 .
  • a second surface 432 is the lower surface of the inner magnet 43 .
  • the second surface 432 is closer to the first stationary contact 10 and the second stationary contact 11 than the first surface 431 is.
  • the second surface 432 faces the space between the first fixed terminal 6 and the second fixed terminal 7 .
  • At least the second surface 432 of the inner magnet 43 may be covered with the insulating material 46 .
  • the entire inner magnet 43 is located between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). That is, the inner magnet 43 is arranged at a position not overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2). However, a part of the inner magnet 43 may be arranged at a position overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
  • FIG. 15 is a diagram showing an electromagnetic relay 1 according to an eleventh modification.
  • the inner magnet 43 may include an intermediate portion 43A, a first portion 43B and a second portion 43C.
  • 43 A of intermediate parts may be located between the 1st fixed terminal 6 and the 2nd fixed terminal 7 seeing from a 2nd direction (Z1, Z2).
  • 43 A of intermediate parts do not need to overlap the 1st fixed terminal 6 and the 2nd fixed terminal 7, seeing from a 2nd direction (Z1, Z2).
  • the first portion 43B may overlap the first fixed terminal 6 when viewed from the second direction (Z1, Z2).
  • the second portion 43C may overlap the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
  • the first fixed terminal 6 may have a U-shape when viewed from the first direction (X1, X2).
  • the first fixed terminal 6 may have an L-shape when viewed from the first direction (X1, X2).
  • the second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
  • FIG. 18 is a diagram showing an electromagnetic relay 1 according to a twelfth modification.
  • the first fixed terminal 6 and the second fixed terminal 7 may extend in the first direction (X1, X2).
  • the first fixed terminal 6 may include a portion extending from the first fixed contact 10 in the first longitudinal direction (X1).
  • the second fixed terminal 7 may include a portion extending from the second fixed contact 11 in the second longitudinal direction (X2).
  • the first fixed terminal 6 may have a plate-like shape.
  • the second fixed terminal 7 may have the same shape as the first fixed terminal 6 .

Abstract

This electromagnetic relay is provided with a first static terminal, a first static contact, a second static terminal, a second static contact, a first movable contact, a second movable contact, a movable contact piece, a drive device, an outside magnet, and an inside magnet. The second static terminal is disposed separated from the first static terminal in a first direction. The first movable contact and the second movable contact are disposed so as to respectively face the first static contact and the second static contact in a second direction. The drive device causes the movable contact piece to move in the second direction. The outside magnet is disposed outside of the first static terminal and the second static terminal. The outside magnet generates a magnetic field for drawing out arcs occurring between the first static contact and the first movable contact and between the second static contact and the second movable contact. As seen from the second direction, at least part of the inside magnet is disposed between the first static terminal and the second static terminal. The inside magnet generates a magnetic field for drawing out arcs in a third direction.

Description

電磁継電器electromagnetic relay
　本発明は、電磁継電器に関する。 The present invention relates to electromagnetic relays.
　電磁継電器では、電流の遮断時に接点においてアークが発生する。そのため、電磁継電器には、アークを消弧するための磁石を備えるものがある。磁石によってアークにローレンツ力が作用することで、アークが引き延ばされ、それによりアークが迅速に消弧される。 In electromagnetic relays, an arc occurs at the contacts when the current is interrupted. Therefore, some electromagnetic relays are equipped with magnets for extinguishing arcs. The Lorentz force acting on the arc by the magnet elongates the arc, thereby rapidly extinguishing the arc.
　例えば、特許文献１の電磁継電器では、第１固定接点と第２固定接点との外側に、一対の磁石が配置されている。一対の磁石は、可動板の長手方向に互いに離れて配置されている。一対の磁石は、可動板の長手方向に交差する方向にアークを引き延ばすための磁界を発生させる。 For example, in the electromagnetic relay of Patent Document 1, a pair of magnets are arranged outside the first fixed contact and the second fixed contact. A pair of magnets are arranged apart from each other in the longitudinal direction of the movable plate. A pair of magnets generate a magnetic field for extending the arc in a direction crossing the longitudinal direction of the movable plate.
特開２０１１－２０４４８０号公報Japanese Patent Application Laid-Open No. 2011-204480
　上述した電磁継電器では、第１固定端子と第２固定端子との間に、ホットガス、或いは金属蒸気が発生することで、第１固定端子と第２固定端子との間でアークが短絡して、アークが継続してしまうことがある。その場合、アークを迅速に消弧することが困難になり、電磁継電器における遮断性能が低下してしまう。本発明の課題は、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることにある。 In the electromagnetic relay described above, hot gas or metal vapor is generated between the first fixed terminal and the second fixed terminal, causing an arc to short circuit between the first fixed terminal and the second fixed terminal. , the arc may continue. In that case, it becomes difficult to quickly extinguish the arc, and the interrupting performance of the electromagnetic relay deteriorates. SUMMARY OF THE INVENTION An object of the present invention is to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals in an electromagnetic relay.
　本発明の一態様に係る電磁継電器は、第１固定端子と、第１固定接点と、第２固定端子と、第２固定接点と、第１可動接点と、第２可動接点と、可動接触片と、駆動装置と、外側磁石と、内側磁石とを備える。第１固定接点は、第１固定端子に接続される。第２固定端子は、第１固定端子から、第１方向に離れて配置される。第２固定接点は、第２固定端子に接続される。第１可動接点は、第２方向において、第１固定接点と向かい合って配置される。第２方向は、第１方向と交差する方向である。第２可動接点は、第２方向において、第２固定接点と向かい合って配置される。可動接触片は、第１可動接点と第２可動接点とに接続される。駆動装置は、可動接触片を第２方向に移動させる。 An electromagnetic relay according to one aspect of the present invention includes a first fixed terminal, a first fixed contact, a second fixed terminal, a second fixed contact, a first movable contact, a second movable contact, and a movable contact piece. , a drive, an outer magnet, and an inner magnet. The first fixed contact is connected to the first fixed terminal. The second fixed terminal is spaced apart in the first direction from the first fixed terminal. The second fixed contact is connected to the second fixed terminal. The first movable contact is arranged to face the first fixed contact in the second direction. The second direction is a direction crossing the first direction. The second movable contact is arranged to face the second fixed contact in the second direction. The movable contact piece is connected to the first movable contact and the second movable contact. The driving device moves the movable contact piece in the second direction.
　外側磁石は、第１固定端子と第２固定端子との外側に配置される。外側磁石は、第１固定接点と第１可動接点との間と、第２固定接点と第２可動接点との間とで発生するアークを引き延ばすための磁界を発生させる。内側磁石は、第２方向から見て、少なくとも一部が第１固定端子と第２固定端子との間に配置される。内側磁石は、第３方向へ、アークを引き延ばすための磁界を発生させる。第３方向は、第１方向及び第２方向に交差する方向である。 The outer magnet is arranged outside the first fixed terminal and the second fixed terminal. The outer magnet generates a magnetic field for extending arcs generated between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact. At least a portion of the inner magnet is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction. The inner magnet generates a magnetic field for extending the arc in a third direction. The third direction is a direction crossing the first direction and the second direction.
　本態様に係る電磁継電器では、外側磁石から生じる磁界によってアークが引き延ばされる。それにより、アークが迅速に消弧される。また、アークが第１固定端子と第２固定端子との間で短絡しても、内側磁石から生じる磁界によって、短絡したアークが第３方向へ引き延ばされる。それにより、第１固定端子と第２固定端子との間で短絡したアークを迅速に消弧することができる。それにより、電磁継電器の遮断性能の低下が抑えられる。 In the electromagnetic relay according to this aspect, the arc is extended by the magnetic field generated by the outer magnet. The arc is thereby quickly extinguished. Also, even if an arc short-circuits between the first fixed terminal and the second fixed terminal, the short-circuited arc is extended in the third direction by the magnetic field generated by the inner magnet. As a result, the short-circuited arc between the first fixed terminal and the second fixed terminal can be quickly extinguished. As a result, deterioration in the breaking performance of the electromagnetic relay is suppressed.
　電磁継電器は、突出部をさらに備えてもよい。突出部は、外側磁石に対して第３方向に配置されてもよい。突出部は、内側磁石に向かって延びていてもよい。この場合、第３方向へ引き延ばされたアークが、突起部の左右へ広げられる。それにより、アークが迅速に消弧される。 The electromagnetic relay may further include a projecting portion. The protrusion may be arranged in a third direction with respect to the outer magnet. The protrusion may extend towards the inner magnet. In this case, the arc extended in the third direction is expanded to the left and right of the protrusion. The arc is thereby quickly extinguished.
　突出部は、内側磁石に向かって先細りの形状を有してもよい。この場合、アークが突起部によって、より効果的に左右へ広げられる。それにより、アークが迅速に消弧される。突出部は、絶縁材製であってもよい。この場合、アークが迅速に消弧される。 The protrusion may have a tapered shape toward the inner magnet. In this case, the arc is more effectively spread left and right by the protrusion. The arc is thereby quickly extinguished. The protrusion may be made of insulating material. In this case, the arc is quickly extinguished.
　第１固定端子は、第１固定端子の外側へ向かう第１角部を含んでもよい。この場合、第１角部により、第１固定端子からアークが延びる方向を制御することができる。それにより、アークを第１固定端子の外側へ向けて容易に引き延ばすことができる。 The first fixed terminal may include a first corner directed to the outside of the first fixed terminal. In this case, the direction in which the arc extends from the first fixed terminal can be controlled by the first corner. Thereby, the arc can be easily extended toward the outside of the first fixed terminal.
　第２固定端子は、第２固定端子の外側へ向かう第２角部を含んでもよい。この場合、第２角部により、第２固定端子からアークが延びる方向を制御することができる。それにより、アークを第２固定端子の外側へ向けて容易に引き延ばすことができる。 The second fixed terminal may include a second corner facing outward of the second fixed terminal. In this case, the direction in which the arc extends from the second fixed terminal can be controlled by the second corner. Thereby, the arc can be easily extended toward the outside of the second fixed terminal.
　内側磁石は、第１表面と第２表面とを含んでもよい。第２表面は、第１表面よりも第１固定接点及び第２固定接点に近くてもよい。内側磁石のうち少なくとも第２表面は。絶縁材で覆われていてもよい。この場合、内側磁石が絶縁材によってアークから保護される。 The inner magnet may include a first surface and a second surface. The second surface may be closer to the first stationary contact and the second stationary contact than the first surface. At least a second surface of the inner magnet. It may be covered with an insulating material. In this case, the inner magnet is protected from arcing by the insulation.
　内側磁石は、中間部分と、第１部分と、第２部分とを含んでもよい。中間部分は、第２方向から見て、第１固定端子と第２固定端子との間に位置してもよい。第１部分は、第２方向から見て、第１固定端子と重なってもよい。第２部分は。第２方向から見て、第２固定端子と重なってもよい。この場合、内側磁石からの磁界によってアークが引き延ばされる範囲が拡大される。 The inner magnet may include an intermediate portion, a first portion, and a second portion. The intermediate portion may be positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction. The first portion may overlap the first fixed terminal when viewed from the second direction. Second part. It may overlap with the second fixed terminal when viewed from the second direction. In this case, the range over which the arc is extended by the magnetic field from the inner magnet is increased.
　本発明によれば、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることができる。 According to the present invention, in an electromagnetic relay, it is possible to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals.
開状態の電磁継電器の断面図である。FIG. 4 is a cross-sectional view of an electromagnetic relay in an open state; 閉状態の電磁継電器の断面図である。FIG. 4 is a cross-sectional view of the electromagnetic relay in a closed state; 接点装置の拡大図である。It is an enlarged view of a contact device. 図１におけるIV－IV断面図である。FIG. 2 is a sectional view along IV-IV in FIG. 1; 第１変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 1st modification. 第２変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 2nd modification. 第３変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 3rd modification. 第４変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 4th modification. 第５変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 5th modification. 第６変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 6th modification. 第７変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on a 7th modification. 第８変形例に係る電磁継電器を示す図である。It is a figure which shows the electromagnetic relay which concerns on an 8th modification. 第９変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to a ninth modification; 第１０変形例に係る電磁継電器を示す図である。FIG. 20 is a diagram showing an electromagnetic relay according to a tenth modification; 第１１変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to an eleventh modified example; 第１１変形例に係る第１固定端子を示す図である。It is a figure showing the 1st fixed terminal concerning the 11th modification. 第１１変形例に係る第１固定端子の他の例を示す図である。It is a figure showing other examples of the 1st fixed terminal concerning the 11th modification. 第１２変形例に係る電磁継電器を示す図である。FIG. 21 is a diagram showing an electromagnetic relay according to a twelfth modification; 第１２変形例に係る第１固定端子を示す図である。It is a figure showing the 1st fixed terminal concerning the 12th modification.
　以下、本発明の実施形態に係る電磁継電器について、図面を参照して説明する。図１は、実施形態に係る電磁継電器１の断面図である。図１に示すように、電磁継電器１は、ケース２と、接点装置３と、駆動装置４とを備えている。ケース２は、樹脂、或いはセラミックなどの絶縁材で形成されている。ケース２内には、接点装置３が収容されている。 An electromagnetic relay according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of an electromagnetic relay 1 according to an embodiment. As shown in FIG. 1, the electromagnetic relay 1 includes a case 2, a contact device 3, and a drive device 4. As shown in FIG. The case 2 is made of an insulating material such as resin or ceramic. A contact device 3 is accommodated in the case 2 .
　接点装置３は、第１固定端子６と、第２固定端子７と、可動接触片８と、可動機構９と、第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とを含む。 The contact device 3 includes a first fixed terminal 6, a second fixed terminal 7, a movable contact piece 8, a movable mechanism 9, a first fixed contact 10, a second fixed contact 11, and a first movable contact 12. , and the second movable contact 13 .
　なお、以下の説明において、可動接触片８が延びる方向が、第１方向（Ｘ１，Ｘ２）と定義される。第１方向（Ｘ１，Ｘ２）は、第１長手方向（Ｘ１）と第２長手方向（Ｘ２）とを含む。第２長手方向（Ｘ２）は、第１長手方向（Ｘ１）と反対の方向である。第２固定接点１１から第１固定接点１０へ向かう方向が第１長手方向（Ｘ１）と定義される。第１固定接点１０から第２固定接点１１へ向かう方向が第２長手方向（Ｘ２）と定義される。 In the following description, the direction in which the movable contact piece 8 extends is defined as the first direction (X1, X2). The first directions (X1, X2) include a first longitudinal direction (X1) and a second longitudinal direction (X2). The second longitudinal direction (X2) is opposite to the first longitudinal direction (X1). A direction from the second fixed contact 11 to the first fixed contact 10 is defined as a first longitudinal direction (X1). A direction from the first fixed contact 10 to the second fixed contact 11 is defined as a second longitudinal direction (X2).
　第１固定接点１０と第１可動接点１２とが互いに向かい合う方向が、第２方向（Ｚ１，Ｚ２）と定義される。第２方向（Ｚ１，Ｚ２）は、上方（Ｚ１）と下方（Ｚ２）とを含む。第１可動接点１２から第１固定接点１０に向かう方向が上方（Ｚ１）と定義される。第１固定接点１０から第１可動接点１２に向かう方向が下方（Ｚ２）と定義される。 The direction in which the first fixed contact 10 and the first movable contact 12 face each other is defined as the second direction (Z1, Z2). The second directions (Z1, Z2) include upward (Z1) and downward (Z2). The direction from the first movable contact 12 to the first fixed contact 10 is defined as upward (Z1). A direction from the first fixed contact 10 to the first movable contact 12 is defined as downward (Z2).
　第１固定端子６と、第２固定端子７と、可動接触片８と、第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とは、導電性を有する材料で形成されている。例えば、第１固定端子６と、第２固定端子７と、可動接触片８とは、リン青銅、ベリリウム銅、黄銅、或いはタフピッチ銅などの端子材として公知の金属材料製である。ただし、第１固定端子６と、第２固定端子７と、可動接触片８とは、これらと異なる材料製であってもよい。第１固定接点１０と、第２固定接点１１と、第１可動接点１２と、第２可動接点１３とは、銅系金属、或いは銀系金属などの接点材として公知の金属材料製である。 The first fixed terminal 6, the second fixed terminal 7, the movable contact piece 8, the first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are electrically conductive. It is made of a material that is flexible. For example, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 are made of metal materials known as terminal materials such as phosphor bronze, beryllium copper, brass, or tough pitch copper. However, the first fixed terminal 6, the second fixed terminal 7, and the movable contact piece 8 may be made of materials different from these materials. The first fixed contact 10, the second fixed contact 11, the first movable contact 12, and the second movable contact 13 are made of metal known as a contact material such as copper-based metal or silver-based metal.
　第１固定端子６と第２固定端子７とは、第２方向（Ｚ１，Ｚ２）に延びている。第１固定端子６と第２固定端子７とは、例えば、円筒状の形状を有している。第１固定端子６と第２固定端子７とは、第１方向（Ｘ１，Ｘ２）に互いに間隔を隔てて配置されている。第１固定端子６には、第１固定接点１０が接続されている。第２固定端子７には、第２固定接点１１が接続されている。第１固定接点１０と第２固定接点１１とは、ケース２内に配置されている。 The first fixed terminal 6 and the second fixed terminal 7 extend in the second direction (Z1, Z2). The first fixed terminal 6 and the second fixed terminal 7 have, for example, a cylindrical shape. The first fixed terminal 6 and the second fixed terminal 7 are spaced apart from each other in the first direction (X1, X2). A first fixed contact 10 is connected to the first fixed terminal 6 . A second fixed contact 11 is connected to the second fixed terminal 7 . The first fixed contact 10 and the second fixed contact 11 are arranged inside the case 2 .
　可動接触片８と第１可動接点１２と第２可動接点１３とは、ケース２内に配置されている。第１可動接点１２と第２可動接点１３とは、可動接触片８に接続されている。第１可動接点１２は、第１固定接点１０に向かい合っている。第１可動接点１２は、第１固定接点１０に接触及び開離可能である。第２可動接点１３は、第２固定接点１１に向かい合っている。第２可動接点１３は、第２固定接点１１に接触及び開離可能である。第１可動接点１２は、第２可動接点１３と第１方向（Ｘ１，Ｘ２）に間隔を隔てて配置されている。 The movable contact piece 8 , the first movable contact 12 and the second movable contact 13 are arranged inside the case 2 . The first movable contact 12 and the second movable contact 13 are connected to the movable contact piece 8 . The first movable contact 12 faces the first fixed contact 10 . The first movable contact 12 can be brought into contact with and separated from the first fixed contact 10 . The second movable contact 13 faces the second fixed contact 11 . The second movable contact 13 can be brought into contact with and separated from the second fixed contact 11 . The first movable contact 12 is spaced apart from the second movable contact 13 in the first direction (X1, X2).
　可動接触片８は、第２方向（Ｚ１，Ｚ２）に移動可能である。可動接触片８は、図１に示す開位置と、図２に示す閉位置とに移動可能である。図１に示すように、可動接触片８が開位置で、可動接点１２，１３は、固定接点１０，１１から離れている。図２に示すように、可動接触片８が閉位置で、可動接点１２，１３は、固定接点１０，１１に接触している。以下、可動接点１２，１３が、固定接点１０，１１に近づく方向が接触方向と定義される。可動接点１２，１３が、固定接点１０，１１から離れる方向が開離方向と定義される。 The movable contact piece 8 is movable in the second direction (Z1, Z2). The movable contact piece 8 is movable between an open position shown in FIG. 1 and a closed position shown in FIG. As shown in FIG. 1, the movable contact piece 8 is in the open position and the movable contacts 12,13 are separated from the fixed contacts 10,11. As shown in FIG. 2, when the movable contact piece 8 is in the closed position, the movable contacts 12 and 13 are in contact with the fixed contacts 10 and 11 . Hereinafter, the direction in which the movable contacts 12 and 13 approach the fixed contacts 10 and 11 is defined as the contact direction. A direction in which the movable contacts 12 and 13 separate from the fixed contacts 10 and 11 is defined as a separation direction.
　可動機構９は、可動接触片８を支持する。可動機構９は、駆動軸１５と接点バネ１６とを含む。駆動軸１５は、可動接触片８に連結される。駆動軸１５は、第２方向（Ｚ１，Ｚ２）に延びており、可動接触片８を第２方向（Ｚ１，Ｚ２）に貫通している。駆動軸１５は、第２方向（Ｚ１，Ｚ２）に移動可能に設けられる。接点バネ１６は、可動接触片８を接触方向へ向けて付勢する。 The movable mechanism 9 supports the movable contact piece 8. The movable mechanism 9 includes a drive shaft 15 and contact springs 16 . A drive shaft 15 is connected to the movable contact piece 8 . The drive shaft 15 extends in the second direction (Z1, Z2) and passes through the movable contact piece 8 in the second direction (Z1, Z2). The drive shaft 15 is provided movably in the second directions (Z1, Z2). The contact spring 16 biases the movable contact piece 8 in the contact direction.
　駆動装置４は、コイル２１と、スプール２２と、可動鉄心２３と、固定鉄心２４と、ヨーク２５と、復帰バネ２６とを含む。駆動装置４は、電磁力によって、可動機構９を介して、可動接触片８を開位置と閉位置とに移動させる。コイル２１は、スプール２２に巻回されている。可動鉄心２３と、固定鉄心２４とは、スプール２２内に配置されている。可動鉄心２３は、駆動軸１５に接続されている。可動鉄心２３は、第２方向（Ｚ１，Ｚ２）に移動可能である。固定鉄心２４は、可動鉄心２３と向かい合って配置されている。復帰バネ２６は、可動鉄心２３を開離方向に付勢している。 The drive device 4 includes a coil 21, a spool 22, a movable iron core 23, a fixed iron core 24, a yoke 25, and a return spring 26. The driving device 4 uses electromagnetic force to move the movable contact piece 8 between the open position and the closed position via the movable mechanism 9 . Coil 21 is wound around spool 22 . The movable core 23 and the fixed core 24 are arranged inside the spool 22 . The movable iron core 23 is connected to the drive shaft 15 . The movable core 23 is movable in the second directions (Z1, Z2). The fixed core 24 is arranged to face the movable core 23 . The return spring 26 biases the movable iron core 23 in the opening direction.
　電磁継電器１では、コイル２１が通電されると、コイル２１から発生する磁界による磁力によって、可動鉄心２３が固定鉄心２４に吸引される。それにより、可動鉄心２３と駆動軸１５とが、復帰バネ２６の付勢力に抗して、接触方向に移動する。それにより、可動接触片８が、図２に示す閉位置へ移動し、可動接点１２，１３が固定接点１０，１１に接触する。なお、可動接点１２，１３が固定接点１０，１１に接触した後、駆動軸１５がさらに接触方向へ移動することによって、接点バネ１６が圧縮される。 In the electromagnetic relay 1 , when the coil 21 is energized, the magnetic force generated by the magnetic field generated by the coil 21 attracts the movable core 23 to the fixed core 24 . Thereby, the movable iron core 23 and the drive shaft 15 move in the contact direction against the biasing force of the return spring 26 . Thereby, the movable contact piece 8 moves to the closed position shown in FIG. After the movable contacts 12 and 13 contact the fixed contacts 10 and 11, the contact spring 16 is compressed by further movement of the drive shaft 15 in the contact direction.
　コイル２１への通電がオフにされると、可動鉄心２３と駆動軸１５とが、復帰バネ２６の付勢力によって、開離方向へ移動する。それにより、可動接触片８が図１に示す開位置へ移動し、可動接点１２，１３が固定接点１０，１１から離れる。 When the coil 21 is de-energized, the movable iron core 23 and the drive shaft 15 are moved in the separating direction by the biasing force of the return spring 26 . As a result, the movable contact piece 8 moves to the open position shown in FIG.
　電磁継電器１は、外側磁石４１，４２を備えている。外側磁石４１，４２は、第１固定接点１０と第１可動接点１２との間と、第２固定接点１１と第２可動接点１３との間とで発生するアークを引き延ばすための磁界を発生させる。外側磁石４１，４２は、第１方向（Ｘ１，Ｘ２）において、第１固定端子６と第２固定端子７との外側に配置される。 The electromagnetic relay 1 has outer magnets 41 and 42 . The outer magnets 41 and 42 generate a magnetic field for extending arcs generated between the first fixed contact 10 and the first movable contact 12 and between the second fixed contact 11 and the second movable contact 13. . The outer magnets 41, 42 are arranged outside the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2).
　外側磁石４１，４２は、第１外側磁石４１と第２外側磁石４２とを含む。第１外側磁石４１と第２外側磁石４２とは、永久磁石である。第１外側磁石４１と第２外側磁石４２とは、ケース２の周囲に配置される。ただし、第１外側磁石４１と第２外側磁石４２とは、ケース２内に配置されてもよい。第１外側磁石４１は、第１固定端子６に対して第１長手方向（Ｘ１）に配置されている。第２外側磁石４２は、第２固定端子７に対して第２長手方向（Ｘ２）に配置されている。 The outer magnets 41 and 42 include a first outer magnet 41 and a second outer magnet 42. The first outer magnet 41 and the second outer magnet 42 are permanent magnets. The first outer magnet 41 and the second outer magnet 42 are arranged around the case 2 . However, the first outer magnet 41 and the second outer magnet 42 may be arranged inside the case 2 . The first outer magnet 41 is arranged in the first longitudinal direction (X1) with respect to the first fixed terminal 6 . The second outer magnet 42 is arranged in the second longitudinal direction (X2) with respect to the second fixed terminal 7 .
　図３は、接点装置３の拡大図である。図４は、図１におけるIV－IV断面図である。以下、第１方向（Ｘ１，Ｘ２）及び第２方向（Ｚ１，Ｚ２）に垂直な方向が、第３方向（Ｙ１，Ｙ２）と定義される。また、第３方向（Ｙ１，Ｙ２）のうちの一方が、第１横方向（Ｙ１）と定義され、第１横方向（Ｙ１）と反対の方向が第２横方向（Ｙ２）と定義される。 FIG. 3 is an enlarged view of the contact device 3. FIG. FIG. 4 is a sectional view along IV-IV in FIG. Hereinafter, a direction perpendicular to the first directions (X1, X2) and the second directions (Z1, Z2) is defined as a third direction (Y1, Y2). Also, one of the third directions (Y1, Y2) is defined as a first lateral direction (Y1), and the direction opposite to the first lateral direction (Y1) is defined as a second lateral direction (Y2). .
　第１外側磁石４１と第２外側磁石４２とは、ケース２内に磁界を発生させる。図３および図４において二点鎖線で示される矢印Ａ１は、第１外側磁石４１及び第２外側磁石４２によって生じる磁界を示している。第１外側磁石４１と第２外側磁石４２とは、互いに異なる極が向かい合って配置されている。例えば、第１外側磁石４１のＮ極が、第２外側磁石４２のＳ極と向かい合っている。 The first outer magnet 41 and the second outer magnet 42 generate a magnetic field inside the case 2 . An arrow A1 indicated by a two-dot chain line in FIGS. 3 and 4 indicates the magnetic field generated by the first outer magnet 41 and the second outer magnet 42. As shown in FIG. The first outer magnet 41 and the second outer magnet 42 are arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 faces the south pole of the second outer magnet 42 .
　電流が第１固定端子６から可動接触片８を通り第２固定端子７へ流れる場合、図４に示すように、第１外側磁石４１からの磁界によって、第１固定接点１０と第１可動接点１２とに生じるアークに、第１ローレンツ力Ｆ１が作用する。第１ローレンツ力Ｆ１は、第１横方向（Ｙ１）に作用する。それにより、アークが、第１ローレンツ力Ｆ１の方向に引き延ばされる。また、第２外側磁石４２からの磁界によって、第２固定接点１１と第２可動接点１３とに生じるアークに、第２ローレンツ力Ｆ２が作用する。第２ローレンツ力Ｆ２は、第２横方向（Ｙ２）に作用する。それにより、アークが、第２ローレンツ力Ｆ２の方向に引き延ばされる。 When current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, as shown in FIG. A first Lorentz force F1 acts on the arc generated at 12 and 12 . The first Lorentz force F1 acts in the first lateral direction (Y1). The arc is thereby elongated in the direction of the first Lorentz force F1. Also, the second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 . The second Lorentz force F2 acts in the second lateral direction (Y2). The arc is thereby elongated in the direction of the second Lorentz force F2.
　電流が上記とは逆に、第２固定端子７から可動接触片８を通り第１固定端子６へ流れる場合、第１外側磁石４１からの磁界によって、第１固定接点１０と第１可動接点１２とに生じるアークに、第１ローレンツ力Ｆ１’が作用する。第１ローレンツ力Ｆ１’は、第２横方向（Ｙ２）に作用する。それにより、アークが、第１ローレンツ力Ｆ１’の方向に引き延ばされる。また、第２外側磁石４２からの磁界によって、第２固定接点１１と第２可動接点１３とに生じるアークに、第２ローレンツ力Ｆ２’が作用する。第２ローレンツ力Ｆ２’は、第１横方向（Ｙ１）に作用する。それにより、アークが、第２ローレンツ力Ｆ２’の方向に引き延ばされる。 Contrary to the above, when the current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, the magnetic field from the first outer magnet 41 causes the first fixed contact 10 and the first movable contact 12 to move. A first Lorentz force F1' acts on the arc generated at and. The first Lorentz force F1' acts in the second lateral direction (Y2). The arc is thereby elongated in the direction of the first Lorentz force F1'. A second Lorentz force F<b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 by the magnetic field from the second outer magnet 42 . The second Lorentz force F2' acts in the first lateral direction (Y1). The arc is thereby elongated in the direction of the second Lorentz force F2'.
　電磁継電器１は、内側磁石４３を備えている。内側磁石４３は、第１固定端子６と第２固定端子７との間で短絡したアークＡＣ１を、第３方向（Ｙ１，Ｙ２）へ引き延ばすための磁界を発生させる。図３において矢印Ａ２は、内側磁石４３によって生じる磁界を示している。内側磁石４３は、例えばＮ極が下方（Ｚ２）を向くように配置される。 The electromagnetic relay 1 has an inner magnet 43 . The inner magnet 43 generates a magnetic field for extending the short-circuited arc AC1 between the first fixed terminal 6 and the second fixed terminal 7 in the third direction (Y1, Y2). Arrow A2 in FIG. 3 indicates the magnetic field generated by the inner magnet 43 . The inner magnet 43 is arranged, for example, so that the N pole faces downward (Z2).
　図４に示すように、内側磁石４３は、少なくとも一部が、第１方向（Ｘ１，Ｘ２）において第１固定端子６と第２固定端子７との間に配置される。内側磁石４３は、ケース２内に配置されている。すなわち、内側磁石４３は、アークを消弧するためのケース２内の遮断空間に配置されている。内側磁石４３は、第１固定接点１０及び第２固定接点１１よりも上方（Ｚ１）に配置される。 As shown in FIG. 4, at least a portion of the inner magnet 43 is arranged between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). The inner magnet 43 is arranged inside the case 2 . That is, the inner magnet 43 is arranged in the shielding space inside the case 2 for extinguishing the arc. The inner magnet 43 is arranged above (Z1) the first fixed contact 10 and the second fixed contact 11 .
　電流が第１固定端子６から可動接触片８を通り第２固定端子７へ流れる場合、短絡したアークＡＣ１に、第３ローレンツ力Ｆ３が作用する。第３ローレンツ力Ｆ３は、第２横方向（Ｙ２）に作用する。それにより、短絡したアークＡＣ１が、第３ローレンツ力Ｆ３の方向に引き延ばされる。 When current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, a third Lorentz force F3 acts on the short-circuited arc AC1. The third Lorentz force F3 acts in the second lateral direction (Y2). As a result, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
　上記とは逆に、電流が第２固定端子７から可動接触片８を通り第１固定端子６へ流れる場合、短絡したアークＡＣ１に、第３ローレンツ力Ｆ３’が作用する。第３ローレンツ力Ｆ３’は、第１横方向（Ｙ１）に作用する。それにより、短絡したアークＡＣ１が、第３ローレンツ力Ｆ３’の方向に引き延ばされる。 Contrary to the above, when current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, a third Lorentz force F3' acts on the short-circuited arc AC1. The third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
　以上説明した本実施形態に係る電磁継電器１では、外側磁石４１，４２から生じる磁界によってアークが引き延ばされる。それにより、アークが迅速に消弧される。また、アークが第１固定端子６と第２固定端子７との間で短絡しても、内側磁石４３から生じる磁界によって、アークが第３方向（Ｙ１，Ｙ２）へ引き延ばされる。それにより、アークが第１固定端子６と第２固定端子７との間で短絡しても、アークを迅速に消弧することができる。それにより、電磁継電器１の遮断性能の低下が抑えられる。 In the electromagnetic relay 1 according to this embodiment described above, the arc is extended by the magnetic fields generated by the outer magnets 41 and 42 . The arc is thereby quickly extinguished. Even if the arc short-circuits between the first fixed terminal 6 and the second fixed terminal 7, the magnetic field generated by the inner magnet 43 extends the arc in the third direction (Y1, Y2). Thereby, even if an arc short-circuits between the first fixed terminal 6 and the second fixed terminal 7, the arc can be quickly extinguished. As a result, deterioration in the breaking performance of the electromagnetic relay 1 is suppressed.
　以上、本発明の一実施形態について説明したが、本発明は上記実施形態に限定されるものではなく、発明の要旨を逸脱しない範囲で種々の変更が可能である。 Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications are possible without departing from the gist of the invention.
　駆動装置４の構造は、上記の実施形態のものに限らず変更されてもよい。例えば、上記の実施形態では、駆動装置４は、接点装置３の下方（Ｚ２）に配置されている。しかし、駆動装置４は、接点装置３に対して、第１方向（Ｘ１，Ｘ２）、或いは第３方向（Ｙ１，Ｙ２）に配置されておよい。上記の実施形態では、接触方向は上方（Ｚ１）であり、開離方向は下方（Ｚ２）である。しかし、接触方向は下方（Ｚ２）であり、開離方向は上方（Ｚ１）であってもよい。 The structure of the driving device 4 is not limited to that of the above embodiment, and may be modified. For example, in the above embodiment, the drive device 4 is arranged below the contact device 3 (Z2). However, the drive device 4 may be arranged in the first direction (X1, X2) or in the third direction (Y1, Y2) with respect to the contact device 3 . In the above embodiment, the contact direction is upward (Z1) and the release direction is downward (Z2). However, the contact direction may be downward (Z2) and the release direction upward (Z1).
　接点装置３の構造は、上記の実施形態のものに限らず変更されてもよい。例えば、固定接点と可動接点との数は２つに限らず、２つより多くてもよい。第１固定接点１０は、第１固定端子６と別体であってもよく、或いは一体であってもよい。第２固定接点１１は、第２固定端子７と別体であってもよく、或いは一体であってもよい。第１可動接点１２は、可動接触片８と別体であってもよく、或いは一体であってもよい。第２可動接点１３は、可動接触片８と別体であってもよく、或いは一体であってもよい。 The structure of the contact device 3 is not limited to that of the above embodiment, and may be modified. For example, the number of fixed contacts and movable contacts is not limited to two, and may be more than two. The first fixed contact 10 may be separate from or integrated with the first fixed terminal 6 . The second fixed contact 11 may be separate from or integral with the second fixed terminal 7 . The first movable contact 12 may be separate from or integral with the movable contact piece 8 . The second movable contact 13 may be separate from or integral with the movable contact piece 8 .
　磁石の配置は、上記の実施形態のものに限らず、変更されてもよい。例えば、第１外側磁石４１と第２外側磁石４２とは、同じ極同士が向かい合うように配置されてもよい。例えば、第１外側磁石４１のＳ極と第２外側磁石４２のＳ極とが、互いに向かい合うように配置されてもよい。 The arrangement of the magnets is not limited to that of the above embodiment, and may be changed. For example, the first outer magnet 41 and the second outer magnet 42 may be arranged such that the same poles face each other. For example, the S pole of the first outer magnet 41 and the S pole of the second outer magnet 42 may be arranged to face each other.
　図５は、第１変形例に係る電磁継電器１を示す図である。図５に示すように、第１外側磁石４１と第２外側磁石４２とは、第３方向（Ｙ１，Ｙ２）に互いに向かい合って配置されてもよい。図５において、矢印Ａ３，Ａ４は、第１外側磁石４１と第２外側磁石４２とによって生じる磁界を示している。第１外側磁石４１と第２外側磁石４２とは、互いに異なる極が向かい合って配置されてもよい。例えば、第１外側磁石４１のＮ極が、第２外側磁石４２のＳ極と向かい合ってもよい。 FIG. 5 is a diagram showing an electromagnetic relay 1 according to a first modified example. As shown in FIG. 5, the first outer magnet 41 and the second outer magnet 42 may be arranged facing each other in the third direction (Y1, Y2). In FIG. 5, arrows A3 and A4 indicate magnetic fields generated by the first outer magnet 41 and the second outer magnet . The first outer magnet 41 and the second outer magnet 42 may be arranged with different poles facing each other. For example, the north pole of the first outer magnet 41 may face the south pole of the second outer magnet 42 .
　この場合、電流が第１固定端子６から可動接触片８を通り第２固定端子７へ流れると、第１固定接点１０と第１可動接点１２とに生じるアークに、第１ローレンツ力Ｆ１が作用する。第１ローレンツ力Ｆ１は、第２長手方向（Ｘ２）に作用する。それにより、アークが、第１ローレンツ力Ｆ１の方向に引き延ばされる。第２固定接点１１と第２可動接点１３とに生じるアークに、第２ローレンツ力Ｆ２が作用する。第２ローレンツ力Ｆ２は、第１長手方向（Ｘ１）に作用する。それにより、アークが、第２ローレンツ力Ｆ２の方向に引き延ばされる。また、短絡したアークＡＣ１に、第３ローレンツ力Ｆ３が作用する。第３ローレンツ力Ｆ３は、第２横方向（Ｙ２）に作用する。それにより、短絡したアークＡＣ１が、第３ローレンツ力Ｆ３の方向に引き延ばされる。 In this case, when a current flows from the first fixed terminal 6 through the movable contact piece 8 to the second fixed terminal 7, a first Lorentz force F1 acts on the arc generated between the first fixed contact 10 and the first movable contact 12. do. The first Lorentz force F1 acts in the second longitudinal direction (X2). The arc is thereby elongated in the direction of the first Lorentz force F1. A second Lorentz force F2 acts on the arc generated between the second fixed contact 11 and the second movable contact 13 . The second Lorentz force F2 acts in the first longitudinal direction (X1). The arc is thereby elongated in the direction of the second Lorentz force F2. A third Lorentz force F3 acts on the short-circuited arc AC1. The third Lorentz force F3 acts in the second lateral direction (Y2). As a result, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3.
　電流が上記とは逆に、第２固定端子７から可動接触片８を通り第１固定端子６へ流れる場合、第１固定接点１０と第１可動接点１２とに生じるアークに、第１ローレンツ力Ｆ１’が作用する。第１ローレンツ力Ｆ１’は、第１長手方向（Ｘ１）に作用する。それにより、アークが、第１ローレンツ力Ｆ１’の方向に引き延ばされる。第２固定接点１１と第２可動接点１３とに生じるアークに、第２ローレンツ力Ｆ２’が作用する。第２ローレンツ力Ｆ２’は、第２長手方向（Ｘ２）に作用する。それにより、アークが、第２ローレンツ力Ｆ２’の方向に引き延ばされる。また、短絡したアークＡＣ１に、第３ローレンツ力Ｆ３’が作用する。第３ローレンツ力Ｆ３’は、第１横方向（Ｙ１）に作用する。それにより、短絡したアークＡＣ１が、第３ローレンツ力Ｆ３’の方向に引き延ばされる。 Contrary to the above, when the current flows from the second fixed terminal 7 through the movable contact piece 8 to the first fixed terminal 6, the arc generated between the first fixed contact 10 and the first movable contact 12 causes the first Lorentz force F1' acts. The first Lorentz force F1' acts in the first longitudinal direction (X1). The arc is thereby elongated in the direction of the first Lorentz force F1'. A second Lorentz force F<b>2 ′ acts on the arc generated between the second fixed contact 11 and the second movable contact 13 . The second Lorentz force F2' acts in the second longitudinal direction (X2). The arc is thereby elongated in the direction of the second Lorentz force F2'. A third Lorentz force F3' acts on the short-circuited arc AC1. The third Lorentz force F3' acts in the first lateral direction (Y1). Thereby, the short-circuited arc AC1 is extended in the direction of the third Lorentz force F3'.
　なお、第１外側磁石４１と第２外側磁石４２とは、同じ極同士が向かい合って配置されてもよい。上述した実施形態の第１外側磁石４１と第２外側磁石４２の配置と、第１実施形態の第１外側磁石４１と第２外側磁石４２とが組み合わされてもよい。すなわち、ケース２の第１長手方向（Ｘ１）と第２長手方向（Ｘ２）と第１横方向（Ｙ１）と第２横方向（Ｙ２）とのそれぞれに、外側磁石４１，４２が配置されてもよい。 The first outer magnet 41 and the second outer magnet 42 may be arranged with the same poles facing each other. The arrangement of the first outer magnets 41 and the second outer magnets 42 of the above embodiment and the first outer magnets 41 and the second outer magnets 42 of the first embodiment may be combined. That is, the outer magnets 41 and 42 are arranged in the first longitudinal direction (X1), the second longitudinal direction (X2), the first lateral direction (Y1), and the second lateral direction (Y2) of the case 2, respectively. good too.
　図６は、第２変形例に係る電磁継電器１を示す図である。図６に示すように、電磁継電器１は、第１突出部４４と第２突出部４５とを備えてもよい。第１突出部４４と第２突出部４５とは、第２方向（Ｚ１，Ｚ２）から見て、外側磁石４１，４２に対して第３方向（Ｙ１，Ｙ２）に配置されてもよい。第１突出部４４と第２突出部４５とは、第１固定接点１０と第２固定接点１１との間に向かって延びていてもよい。 FIG. 6 is a diagram showing an electromagnetic relay 1 according to a second modified example. As shown in FIG. 6 , the electromagnetic relay 1 may include a first projecting portion 44 and a second projecting portion 45 . The first projecting portion 44 and the second projecting portion 45 may be arranged in the third direction (Y1, Y2) with respect to the outer magnets 41, 42 when viewed from the second direction (Z1, Z2). The first protrusion 44 and the second protrusion 45 may extend between the first fixed contact 10 and the second fixed contact 11 .
　詳細には、第１突出部４４は、外側磁石４１，４２に対して第１横方向（Ｙ１）に配置されてもよい。第２突出部４５は、第３方向（Ｙ１，Ｙ２）において第１突出部４４と反対側に配置されてもよい。すなわち、第２突出部４５は、外側磁石４１，４２に対して第２横方向（Ｙ２）に配置されてもよい。第１、第２突出部４４，４５は、内側磁石４３に向かって延びていてもよい。 Specifically, the first projecting portion 44 may be arranged in the first lateral direction (Y1) with respect to the outer magnets 41 and 42 . The second protrusion 45 may be arranged on the side opposite to the first protrusion 44 in the third direction (Y1, Y2). That is, the second protrusion 45 may be arranged in the second lateral direction (Y2) with respect to the outer magnets 41,42. The first and second protrusions 44 and 45 may extend toward the inner magnet 43 .
　第１、第２突出部４４，４５は、内側磁石４３に向かって先細りの形状を有してもよい。第１突出部４４は、第２横方向（Ｙ２）に向かって先細りの形状を有してもよい。第２突出部４５は、第１横方向（Ｙ１）に向かって先細りの形状を有してもよい。第１、第２突出部４４，４５は、樹脂、或いはセラミックなどの絶縁材製であってもよい。この場合、内側磁石４３によって第３方向（Ｙ１，Ｙ２）に引き延ばされるアークＡＣ１が、第１、第２突出部４４，４５によって第１方向（Ｘ１，Ｘ２）に広げられる。それにより、アークＡＣ１が迅速に消弧される。 The first and second protrusions 44 and 45 may have a tapered shape toward the inner magnet 43 . The first protrusion 44 may have a tapered shape in the second horizontal direction (Y2). The second protrusion 45 may have a tapered shape in the first lateral direction (Y1). The first and second protrusions 44 and 45 may be made of an insulating material such as resin or ceramic. In this case, the arc AC1 extended in the third direction (Y1, Y2) by the inner magnet 43 is spread in the first direction (X1, X2) by the first and second projections 44, 45. FIG. Arc AC1 is thereby quickly extinguished.
　図７は、第３変形例に係る電磁継電器１を示す図である。図７に示すように、電磁継電器１は、複数の第１突出部４４Ａ，４４Ｂと複数の第２突出部４５Ａ，４５Ｂとを備えてもよい。 FIG. 7 is a diagram showing an electromagnetic relay 1 according to a third modified example. As shown in FIG. 7, the electromagnetic relay 1 may include a plurality of first protrusions 44A, 44B and a plurality of second protrusions 45A, 45B.
　突出部の形状は、上記の実施形態のような先細りの形状に限らず、他の形状であってもよい。図８は、第４変形例に係る電磁継電器１を示す図である。図８に示すように、突出部４４，４５は、直線状の形状であってもよい。 The shape of the projecting portion is not limited to the tapered shape as in the above embodiment, and may be another shape. FIG. 8 is a diagram showing an electromagnetic relay 1 according to a fourth modification. As shown in FIG. 8, the projections 44, 45 may have a linear shape.
　固定端子６，７の形状は、上記の実施形態のような円筒形に限らず、他の形状であってもよい。図９は、第５変形例に係る電磁継電器１を示す図である。図９に示すように、固定端子６，７は、四角柱状であってもよい。第１固定端子６は、第２方向（Ｚ１，Ｚ２）から見て、第１固定端子６の外側へ向かう第１角部６Ａ，６Ｂを含んでもよい。第２固定端子７は、第２方向（Ｚ１，Ｚ２）から見て、第２固定端子７の外側へ向かう第２角部７Ａ，７Ｂを含んでもよい。 The shape of the fixed terminals 6 and 7 is not limited to the cylindrical shape as in the above embodiment, and may be other shapes. FIG. 9 is a diagram showing an electromagnetic relay 1 according to a fifth modification. As shown in FIG. 9, the fixed terminals 6 and 7 may have a square prism shape. The first fixed terminal 6 may include first corners 6A, 6B facing outward of the first fixed terminal 6 when viewed from the second direction (Z1, Z2). The second fixed terminal 7 may include second corners 7A and 7B extending outward of the second fixed terminal 7 when viewed in the second direction (Z1, Z2).
　第１角部６Ａは、第２長手方向（Ｘ２）且つ第１横方向（Ｙ１）を向いていてもよい。第１角部６Ｂは、第２長手方向（Ｘ２）且つ第２横方向（Ｙ２）を向いていてもよい。第２角部７Ａは、第１長手方向（Ｘ１）且つ第１横方向（Ｙ１）を向いていてもよい。第２角部７Ｂは、第１長手方向（Ｘ１）且つ第２横方向（Ｙ２）を向いていてもよい。この場合、アークを引き延ばす方向を角部６Ａ，６Ｂ，７Ａ，７Ｂが向かう方向へ制御することができる。 The first corner 6A may face the second longitudinal direction (X2) and the first lateral direction (Y1). The first corner 6B may face the second longitudinal direction (X2) and the second lateral direction (Y2). The second corner portion 7A may face the first longitudinal direction (X1) and the first lateral direction (Y1). The second corner 7B may face the first longitudinal direction (X1) and the second lateral direction (Y2). In this case, the direction in which the arc is extended can be controlled in the direction in which the corners 6A, 6B, 7A, and 7B are directed.
　図１０は、第６変形例に係る電磁継電器１を示す図である。図１０に示すように、第１角部６Ａ，６Ｂと第２角部７Ａ，７Ｂとは、第３方向（Ｙ１，Ｙ２）を向いていてもよい。第１角部６Ａと第２角部７Ａとは、第１横方向（Ｙ１）を向いていてもよい。第１角部６Ｂと第２角部７Ｂとは、第２横方向（Ｙ２）を向いていてもよい。 FIG. 10 is a diagram showing an electromagnetic relay 1 according to a sixth modification. As shown in FIG. 10, the first corners 6A, 6B and the second corners 7A, 7B may face the third direction (Y1, Y2). The first corner 6A and the second corner 7A may face the first horizontal direction (Y1). The first corner 6B and the second corner 7B may face the second horizontal direction (Y2).
　固定端子６，７は、四角柱状に限らず、他の形状であってもよい。図１１は、第７変形例に係る電磁継電器１を示す図である。図１１に示すように、固定端子６，７は、三角柱状であってもよい。或いは、固定端子６，７は、三角柱以外の形状であってもよい。 The fixed terminals 6 and 7 are not limited to having a square prism shape, and may have other shapes. FIG. 11 is a diagram showing an electromagnetic relay 1 according to a seventh modification. As shown in FIG. 11, the fixed terminals 6 and 7 may have a triangular prism shape. Alternatively, the fixed terminals 6 and 7 may have a shape other than a triangular prism.
　内側磁石４３の形状、或いは配置は、上記の実施形態のものに限らず、変更されてもよい。上記の実施形態では、内側磁石４３は、ケース２内の遮断空間に配置されている。しかし、内側磁石４３は、遮断空間の外側に配置されてもよい。図１２は、第８変形例に係る電磁継電器１を示す図である。図１２に示すように、内側磁石４３は、ケース２の外部に配置されてもよい。 The shape or arrangement of the inner magnets 43 is not limited to those in the above embodiment, and may be changed. In the above embodiments, the inner magnets 43 are arranged in the shielded space inside the case 2 . However, the inner magnet 43 may be arranged outside the shielded space. FIG. 12 is a diagram showing an electromagnetic relay 1 according to an eighth modification. As shown in FIG. 12, the inner magnet 43 may be arranged outside the case 2 .
　図１３は、第９変形例に係る電磁継電器１を示す図である。図１３に示すように、内側磁石４３は、樹脂、或いはセラミックなどの絶縁材４６で覆われてもよい。例えば、内側磁石４３の全体が、絶縁材４６で覆われてもよい。 FIG. 13 is a diagram showing an electromagnetic relay 1 according to a ninth modification. As shown in FIG. 13, the inner magnet 43 may be covered with an insulating material 46 such as resin or ceramic. For example, the entire inner magnet 43 may be covered with insulating material 46 .
　或いは、図１４は、第１０変形例に係る電磁継電器１を示す図である。図１４に示すように、内側磁石４３の一部のみが、絶縁材４６で覆われてもよい。内側磁石４３は、第１表面４３１と第２表面４３２とを含む。第１表面４３１は、内側磁石４３の上面である。第２表面４３２は、内側磁石４３の下面である。第２表面４３２は、第１表面４３１よりも第１固定接点１０及び第２固定接点１１に近い。第２表面４３２は、第１固定端子６と第２固定端子７との間の空間に面している。内側磁石４３のうち少なくとも第２表面４３２が、絶縁材４６で覆われていてもよい。 Alternatively, FIG. 14 is a diagram showing an electromagnetic relay 1 according to a tenth modification. As shown in FIG. 14, only a portion of the inner magnet 43 may be covered with the insulating material 46 . Inner magnet 43 includes a first surface 431 and a second surface 432 . The first surface 431 is the top surface of the inner magnet 43 . A second surface 432 is the lower surface of the inner magnet 43 . The second surface 432 is closer to the first stationary contact 10 and the second stationary contact 11 than the first surface 431 is. The second surface 432 faces the space between the first fixed terminal 6 and the second fixed terminal 7 . At least the second surface 432 of the inner magnet 43 may be covered with the insulating material 46 .
　上記の実施形態では、内側磁石４３の全体が、第１方向（Ｘ１，Ｘ２）において、第１固定端子６と第２固定端子７との間に位置している。すなわち、内側磁石４３は、第２方向（Ｚ１，Ｚ２）から見て、第１固定端子６と第２固定端子７とに重ならない位置に配置されている。しかし、内側磁石４３の一部が、第２方向（Ｚ１，Ｚ２）から見て、第１固定端子６と第２固定端子７とに重なる位置に配置されてもよい。 In the above embodiment, the entire inner magnet 43 is located between the first fixed terminal 6 and the second fixed terminal 7 in the first direction (X1, X2). That is, the inner magnet 43 is arranged at a position not overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2). However, a part of the inner magnet 43 may be arranged at a position overlapping the first fixed terminal 6 and the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
　例えば、図１５は、第１１変形例に係る電磁継電器１を示す図である。図１５に示すように、内側磁石４３は、中間部分４３Ａと、第１部分４３Ｂと、第２部分４３Ｃとを含んでもよい。中間部分４３Ａは、第２方向（Ｚ１，Ｚ２）から見て第１固定端子６と第２固定端子７との間に位置してもよい。中間部分４３Ａは、第２方向（Ｚ１，Ｚ２）から見て第１固定端子６と第２固定端子７とに重ならなくてもよい。第１部分４３Ｂは、第２方向（Ｚ１，Ｚ２）から見て第１固定端子６と重なっていてもよい。第２部分４３Ｃは、第２方向（Ｚ１，Ｚ２）から見て第２固定端子７と重なっていてもよい。 For example, FIG. 15 is a diagram showing an electromagnetic relay 1 according to an eleventh modification. As shown in FIG. 15, the inner magnet 43 may include an intermediate portion 43A, a first portion 43B and a second portion 43C. 43 A of intermediate parts may be located between the 1st fixed terminal 6 and the 2nd fixed terminal 7 seeing from a 2nd direction (Z1, Z2). 43 A of intermediate parts do not need to overlap the 1st fixed terminal 6 and the 2nd fixed terminal 7, seeing from a 2nd direction (Z1, Z2). The first portion 43B may overlap the first fixed terminal 6 when viewed from the second direction (Z1, Z2). The second portion 43C may overlap the second fixed terminal 7 when viewed from the second direction (Z1, Z2).
　この場合、図１６に示すように、第１固定端子６は、第１方向（Ｘ１，Ｘ２）から見てＵ字型の形状を有していてもよい。或いは、図１７に示すように、第１固定端子６は、第１方向（Ｘ１，Ｘ２）から見てＬ字型の形状を有していてもよい。第２固定端子７は、第１固定端子６と同様の形状を有してもよい。 In this case, as shown in FIG. 16, the first fixed terminal 6 may have a U-shape when viewed from the first direction (X1, X2). Alternatively, as shown in FIG. 17, the first fixed terminal 6 may have an L-shape when viewed from the first direction (X1, X2). The second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
　図１８は、第１２変形例に係る電磁継電器１を示す図である。図１８に示すように、第１固定端子６と第２固定端子７とは、第１方向（Ｘ１，Ｘ２）に延びていてもよい。詳細には、第１固定端子６は、第１固定接点１０から第１長手方向（Ｘ１）に延びる部分を含んでもよい。第２固定端子７は、第２固定接点１１から第２長手方向（Ｘ２）に延びる部分を含んでもよい。この場合、図１９に示すように、第１固定端子６は、板状の形状であってもよい。第２固定端子７は、第１固定端子６と同様の形状であってもよい。 FIG. 18 is a diagram showing an electromagnetic relay 1 according to a twelfth modification. As shown in FIG. 18, the first fixed terminal 6 and the second fixed terminal 7 may extend in the first direction (X1, X2). Specifically, the first fixed terminal 6 may include a portion extending from the first fixed contact 10 in the first longitudinal direction (X1). The second fixed terminal 7 may include a portion extending from the second fixed contact 11 in the second longitudinal direction (X2). In this case, as shown in FIG. 19, the first fixed terminal 6 may have a plate-like shape. The second fixed terminal 7 may have the same shape as the first fixed terminal 6 .
　本発明によれば、電磁継電器において、固定端子間においてアークが短絡することによる遮断性能の低下を抑えることができる。 According to the present invention, in an electromagnetic relay, it is possible to suppress deterioration in breaking performance due to arc short-circuiting between fixed terminals.
　４：駆動装置，　６：第１固定端子，　６Ａ：第１角部，　７：第２固定端子，　７Ａ：第２角部，　８：可動接触片，　１０：第１固定接点，　１１：第２固定接点，　１２：第１可動接点，　１３：第２可動接点，　４１：第１外側磁石，　４３：内側磁石，　４３Ａ：中間部分，　４３Ｂ：第１部分，　４３Ｃ：第２部分，　４４：第１突出部，　４６：絶縁材，　４３１：第１表面，　４３２：第２表面
  4: drive device, 6: first fixed terminal, 6A: first corner, 7: second fixed terminal, 7A: second corner, 8: movable contact piece, 10: first fixed contact, 11: second Fixed contact 12: First movable contact 13: Second movable contact 41: First outer magnet 43: Inner magnet 43A: Intermediate portion 43B: First portion 43C: Second portion 44: First Projection 46: Insulating material 431: First surface 432: Second surface

Claims (8)

  1. 　第１固定端子と、
    　前記第１固定端子に接続された第１固定接点と、
    　前記第１固定端子から、第１方向に離れて配置された第２固定端子と、
    　前記第２固定端子に接続された第２固定接点と、
    　前記第１方向と交差する第２方向において、前記第１固定接点と向かい合って配置された第１可動接点と、
    　前記第２方向において、前記第２固定接点と向かい合って配置された第２可動接点と、
    　前記第１可動接点と前記第２可動接点とに接続された可動接触片と、
    　前記可動接触片を前記第２方向に移動させる駆動装置と、
    　前記第１固定端子と前記第２固定端子との外側に配置され、前記第１固定接点と前記第１可動接点との間と、前記第２固定接点と前記第２可動接点との間とで発生するアークを引き延ばすための磁界を発生させる外側磁石と、
    　前記第２方向から見て、少なくとも一部が前記第１固定端子と前記第２固定端子との間に配置され、前記第１方向及び前記第２方向に交差する第３方向へ、前記アークを引き延ばすための磁界を発生させる内側磁石と、
    を備える電磁継電器。     a first fixed terminal;
    a first fixed contact connected to the first fixed terminal;
    a second fixed terminal spaced apart in a first direction from the first fixed terminal;
    a second fixed contact connected to the second fixed terminal;
    a first movable contact arranged to face the first fixed contact in a second direction that intersects with the first direction;
    a second movable contact arranged to face the second fixed contact in the second direction;
    a movable contact piece connected to the first movable contact and the second movable contact;
    a driving device for moving the movable contact piece in the second direction;
    arranged outside the first fixed terminal and the second fixed terminal, between the first fixed contact and the first movable contact and between the second fixed contact and the second movable contact; an outer magnet for generating a magnetic field for stretching the generated arc;
    At least a portion of the arc is arranged between the first fixed terminal and the second fixed terminal when viewed from the second direction, and the arc is directed in a third direction crossing the first direction and the second direction. an inner magnet for generating a magnetic field for stretching;
    An electromagnetic relay with
  2. 　前記外側磁石に対して前記第３方向に配置され、前記内側磁石に向かって延びる突出部をさらに備える、
    請求項１に記載の電磁継電器。     further comprising a protrusion disposed in the third direction with respect to the outer magnet and extending toward the inner magnet;
    The electromagnetic relay according to claim 1.
  3. 　前記突出部は、前記内側磁石に向かって先細りの形状を有する、
    請求項２に記載の電磁継電器。     the protrusion has a tapered shape toward the inner magnet,
    The electromagnetic relay according to claim 2.
  4. 　前記突出部は、絶縁材製である、
    請求項２又は３に記載の電磁継電器。     The protrusion is made of an insulating material,
    The electromagnetic relay according to claim 2 or 3.
  5. 　前記第１固定端子は、前記第１固定端子の外側へ向かう第１角部を含む、
    請求項１から４のいずれかに記載の電磁継電器。     The first fixed terminal includes a first corner directed outward of the first fixed terminal,
    The electromagnetic relay according to any one of claims 1 to 4.
  6. 　前記第２固定端子は、前記第２固定端子の外側へ向かう第２角部を含む、
    請求項１から５のいずれかに記載の電磁継電器。     The second fixed terminal includes a second corner facing outward of the second fixed terminal,
    The electromagnetic relay according to any one of claims 1 to 5.
  7. 　前記内側磁石は、
    　　第１表面と
    　　前記第１表面よりも前記第１固定接点及び前記第２固定接点に近い第２表面と、
    　を含み、
    　前記内側磁石のうち少なくとも前記第２表面は。絶縁材で覆われている、
    請求項１から６のいずれかに記載の電磁継電器。     The inner magnet is
    a first surface; and a second surface closer to the first stationary contact and the second stationary contact than the first surface;
    including
    at least the second surface of the inner magnet; covered with insulation,
    The electromagnetic relay according to any one of claims 1 to 6.
  8. 　前記内側磁石は、
    　　前記第２方向から見て前記第１固定端子と前記第２固定端子との間に位置する中間部分と、
    　　前記第２方向から見て前記第１固定端子と重なる第１部分と、
    　　前記第２方向から見て前記第２固定端子と重なる第２部分と、
    　を含む、
    請求項１から７のいずれかに記載の電磁継電器。
          The inner magnet is
    an intermediate portion positioned between the first fixed terminal and the second fixed terminal when viewed from the second direction;
    a first portion that overlaps with the first fixed terminal when viewed from the second direction;
    a second portion that overlaps with the second fixed terminal when viewed from the second direction;
    including,
    The electromagnetic relay according to any one of claims 1 to 7.
PCT/JP2022/001484 2021-03-05 2022-01-18 Electromagnetic relay WO2022185746A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
CN202280015556.0A CN116888702A (en) 2021-03-05 2022-01-18 Electromagnetic relay
US18/278,619 US20240128034A1 (en) 2021-03-05 2022-01-18 Electromagnetic relay
DE112022000457.6T DE112022000457T5 (en) 2021-03-05 2022-01-18 ELECTROMAGNETIC RELAY
KR1020237027731A KR20230130106A (en) 2021-03-05 2022-01-18 electronic relay

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-035410 2021-03-05
JP2021035410A JP7392678B2 (en) 2021-03-05 2021-03-05 electromagnetic relay

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JP (1) JP7392678B2 (en)
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CN (1) CN116888702A (en)
DE (1) DE112022000457T5 (en)
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204480A (en) * 2010-03-25 2011-10-13 Panasonic Electric Works Co Ltd Contact device
JP2014110094A (en) * 2012-11-30 2014-06-12 Fuji Electric Co Ltd Contact point device and electromagnetic switch using the same
JP2016012505A (en) * 2014-06-30 2016-01-21 富士電機機器制御株式会社 Contact mechanism, and electromagnetic contactor employing the same
JP2019096474A (en) * 2017-11-22 2019-06-20 富士電機機器制御株式会社 Contact mechanism and electromagnetic contactor using the same
JP2020030911A (en) * 2018-08-21 2020-02-27 オムロン株式会社 relay

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011204480A (en) * 2010-03-25 2011-10-13 Panasonic Electric Works Co Ltd Contact device
JP2014110094A (en) * 2012-11-30 2014-06-12 Fuji Electric Co Ltd Contact point device and electromagnetic switch using the same
JP2016012505A (en) * 2014-06-30 2016-01-21 富士電機機器制御株式会社 Contact mechanism, and electromagnetic contactor employing the same
JP2019096474A (en) * 2017-11-22 2019-06-20 富士電機機器制御株式会社 Contact mechanism and electromagnetic contactor using the same
JP2020030911A (en) * 2018-08-21 2020-02-27 オムロン株式会社 relay

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DE112022000457T5 (en) 2023-10-12
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JP7392678B2 (en) 2023-12-06
US20240128034A1 (en) 2024-04-18

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